Typewriting machine



Nov. 2, 1943. w HELMOND 2,333,566

TYPEWRITING MACHINE 7 Filed May 20, 1941 3 Sheets-Sheet 1 lNVENTOR WlLLlAM F. HELMOND BY 1% v TTORNEY NOV. 1943- w. F. HELMOND TYPEWRITING MACHINE Filed May 20, 1941 3 Sheets-Sheet 2 INVENTOR WILLIAM F- HELM ATTORNEY Nov. 2, 1943.

w. F. HE LMOND TYPEWRITING MACHINE Filed May 20, 1941 5 Sheets-Sheet 3 INVENTOR WILLIAM F. HELPIOND ,6 ATTORNEY Patented Nov. 2, 1943 William F. llelmond. Clinton, Com,

asaignor to Underwood Elliott Fisher Oompany,'New York. N. Y., a corporation of Delaware Application May 20, 1941,'Serlnl No. 394,302

18 Claims. (01. 197-66) This invention relates to stop-mechanism for easin the extent of movement of a typing carriage, and is herein shown applied to gaging carriage return movement at will to intermediate line-start positions as distinguished from mturning the carriage to an extreme line-start position.

There may be oneor more intermediate stops. Each intermediate stop is normally ineffective relatively to a counterstop-device so as to permit the carriage to be returned ordinarily to an extreme position.

Each intermediate stop includes a key, manually operable at will preparatory to a return of the carriage, whereby such intermediate stop and the counterstop device are enabled to cooperate to limit the carriage return to a corresponding intermediate line-start position. Any intermediate stop, together with its key and an element keyoperable to enable the intermediate stop to function, are shiftable to diflerent stations in order to establish variably the intermediate line-start position.

The operation of such' key of the stop may also cause a power mechanism to function to return the carriage to said stop irrespective of its station.

The features so far indicated also characterize, generally, the stop mechanism disclosed in the W. F. Helmond Patent No. 2,160,251, dated May 30, 1939.

An object of the present invention is to provide a novel stop which may be enabled to function upon operation of its key, but irrespective of manually keeping the key operated until the carriage has been returned to the stop. Therefore, provision is made to keep a stop element, which is key-settable to enable the stop to function, automatically in operated position independently of manually keeping the key in operated position. Thus, by a momentary manual operation of the key as by merely tapping it, eilectivity ever, the carriage may also be returned manually in conjunction with the key-determined use of the stop.

Another object is to provide a stop that is durable, e'flicient, composed of few parts, and readily applicable to existing kinds of typing machines.

Another object is to make use of existing means in present machines to further the purposes of the novel stop mechanism.

The foregoing and other objects, features and advantages will be apparent from the following description and accompanying drawings of a preferred embodiment of the invention.

In said drawings:

Figure 1 is a cross-sectional side elevation of a typing machine and'the'novel stop mechanism.

Figure 2 is a large-scale cross-sectional side view of the stop mechanism with the parts in normal position.

Figure 3 is a view similar to Figure 2 but showing the stop mechanism in eflfective condition as determined by operation of the key.

Figure 4 is a fragmentary front view, partly sectioned, of the rear portion of the stop and its support.

Figure 5 is a cross-sectional-side view of a stop adapted to limit an extreme carriage return.

Figure 6 is a perspective of the stop mechanism.

Figure '7 is a cross-sectional side view of the stop according to a modification.

Figure 8 is a front view of parts of the stop mechanism, including the enabling element in operated position and engaged by a part on the returning carriage.

Figure 9 is a front view similar to Figure 8 showing the engaged part on the carriage operated to render a counterstop cooperative with the intermediate stop.

Figure 10 is a view similar to Figure 9 and illustrates the parts in their restored position immediately following the return of the carriage to the intermediate stop.

Type bars I5, Figure 1, are operable under control of type keys l8 for typing on'a work sheet II on a revoluble platen [8 in a carriage l9 movable on guide rails 20 on main frame 2|. Carriage-feed-rack 22, escapement wheel 23, escapement dogs 24 and a spring motor, not shown, cooperate to advance the carriage leftward during typing of a line.

Leftwardcarriage movement is-limitedby a margin stop 25, partly shown; and return carriage movement is limited by a margin stop 26 partly shown, Figure 6.- Said margin stops 25, 26 determine the two extremes of the variable movement, is at the end -'at different stations as main frame at 48 so corsupported in standards 28 of main frame 2|.

A counterstop 38, to limit the carriage return of an arm 3| of a lever 32 pivoted on a stud 33 in a front cross member 34 of the carriage frame. An arm 35 of said counterstop lever 32 ha a finger piece 38 for rocking said leverfrom the Figure 10 normal position in which counterstop 38 is in alignment with margin stop 28, to a position in which. counterstop 38 is above said margin stop 28 to permit the carriage to be moved rightwardly beyond said margin stop 28. Opposite tails .31 of a spring supported by stud 31 on the carriage frame and pins 31" in the counterstop lever 32 to keep the latter poised in normal position as in said Patent-No. 2,160,251.

The left margin cross bar 38 having end arms 38 fulcrumed on front cross rod 21. A torsion spring 48, Figure 8, engages main frame standard 28 and reacts on a pin 48 in the left end-arm 38 to urge cross-bar 38 upwardly to normal said pin 48' and the right cross bar arm 38 abut the standards 28 to holdthe cross bar 38 laterally. Said cross bar 38 has rack teeth 4| to locate and hold the left set forth in said Patent No. 2,160,251 which also shows a counterstop, herein not shown, projecting from the carriage cross member 34 to. engage the left margin stop 25 to limit the leftward movement of the carriage. Said latter counterstop may also engage cam 42 on the left margin stop 25 to rock the latter downwardly about the front cross-rod 21 to depress cross bar 38 for automatically initiating a power driven carriage return movement as the carriage takes the last letter feed step to a line-end of typing.

Referring to the carriage return mechanism, Figure 1, cross bar 38 has pivoted thereto at 43, a thrust rod 44. Depression of cross bar 38 depresses rod 44 to rock a lever 45 pivoted to the that said lever by means of a pin-and-slot connection 41 lifts a carriage return trip link 48 to disengage a latch shoulder 48 of the latter from a holding plate 58. The resulting rearward movement of the lifted trip link 48 by a spring 54 acts through an intermediate train to slide a carriage return pinion meshing with a rack 52 on the carriage, rearwardly along a pinion shaft 53 to be clutched to the latter. Said intermediate train includes a rock shaft 58 having a pinion shifter 51 and connected by arm 58, lin 58 and arm 88 to a rock shaft 8| having an arm 82 pivotally connected to trip link 48. Rock shaft 8| has an arm 83 pivoted to a control link 84 that normally holds a spring contact 85 disengaged from. a contact 88 carriage return motor, not shown, is normally at rest, said contacts forming a motor switch. Rearward movement of trip link 48 permits said contacts to close .to start the motor. A motor shaft 81 drives pinion shaft 53 through a worm and gear connection 88.

A carriage-return key lever 88 pivoted to main frame 2| is manually rockable to a stop 18 to engageand pass a pawl 1| on trip link 48 and thereby lift and release the latter from plate 58 to start the carriage return operation. Other details of the mechanism operative at release of trip link 48, to cause a return of the carriage stop 25, Figure 6, bears on a position. The end of margin stop 25 laterally so that an electricv 33 cooperate with abutments are substantially as shown in aforesaid Patent No. 2,180,251.

"rightwardly and, being interlocked with cross rod 28, moves the latter endwise to the right, said cross rod being siidably retained in standards 28 v and its rightward movement being limited by a shoulder 14 thereof meeting 28. By means of a link 15, Figure 8, having a pin-and-slot connection 18 to a bracket 11 fastened to cross rod 28, the rightward movement of the latter rocks a bell crank 18 clockwise of The clockwise rocking of said shaft 88 also rocks shaft 8| counterclockwise torestore trip link 48 forwardly to reengage its latch shoulder 48 with plate 88 and to also restore switch link 84 to open switch contacts 85, 88 for stopping the motor. The pin-and-slot connection 18 in the described train from cross rod 28 to the carriage return pinion 5| permits the latter to move, to clutch shaft 53, independently of said cross rod 28 when the latter is in its normal or leftwardly retracted position. mally .keepssaid cross rod 28 in its leftwardly retracted position determined-by abutment of a headed stop screw 84 in cross rod 28 with right standard 28. A depending fork 85 of cross rod 28 keeps the latter from turning by embracing a pin 88 in left standard-28. Immediately following the arrest of the rightward return of the carriage at disengagement of the carriage return pinion 5|. by means of cross rod 28, the carriage has the usual carriage-spring-urged drop-back movement of approximately one letter space due to the usual back-lash in the escape'ment devices 23, 24, and this drop-back movement of the carriage permits the leftward retraction of rear cross rod 28 by spring 83.

The novel margin stop will now be described.

Figure 6' illustrates the provision of two intermediate carriage-return margin stops or units 8 besides the extreme carriage return stop 28. number of intermediate stops 8 provided may may be alike, except that where several are employed, they are placeable at different stations.

Each unit S includes .a body 88 slidably supported by and laterally adjustable along the cross rods 21, 28. A stop lug 88 on the body is below, see Figures 6, 8 and 10, the normal path of the counterstop 38 on the carriage, so that normally the return movement of the latter is limited by the extreme margin stop 28. A lock pawl 8| is pivoted to the body 88 and is spring-pressed to engage teeth 82 of the rear cross rod 28 to locate and hold the unit S laterally at any station. For releasing the unit 8 for lateral adjustment, the lock pawl 8| may be retracted by means of its finger piece 83. Each stop unit S has a shift handle 84, and it also has a pointer 85 to indicate its station on a letter-space scale 88 on the main frame. The extreme margin stop 28 has a body.

lock-pawl, releasing finger piece, shift handle the right standard" A spring 83 normechanism for gagingreturn of the carriage to intermediate positions vary-according to need and they and pointer substantially as above described for I the unit 8 and, the latter, is adjustable laterally.

Each unit 8 has a headed stud 88 in the stop body 88 to pivotally support a plate 88 against the side of the body. Body 88 is drilled at I88, Figurea-to house a'detent spring "I and a detent ball I82 seatable in either one or two depressions pressedtobeenabledtomeet, d. u888be--- I03 in plate 98 iorholding said plate in normal the latter clockwise from the normal position,

' erates with an edge IIO ot'plate 88gi'or turning a Figure 2, to the operated position, Figure 3, by

finger operation upon key I08.

In the normal position of plate 99, a tappetarm I I I thereon is below and hence is out of the path of a cam-arm 2 of a counterstop control lever II3 iulcrumed on a headed stud H4 in carriage cross member 34, said lever II3 having a pin and slot connection H8 to counterstop lever 32.

It will be seen now that, with the carriage in an advanced position so that said cam arm H2 is to the left of the tappet arm II I of any intermediate stop unit S, operation of the key I08 of such unit turns its plate 99 to operated position so that its tappet arm III stands elevated in the path of the counterstop-controlling cam arm II2. Then, if the carriage is returned, the elevated tappet arm III will meet and displace the cam arm II2 to turn lever II3 clockwise about stud II4 to turn the counterstop lever 32 counterclockwise about its stud 33, against the force of the spring 31, to-depress the carriage counter stop 30 into line with the stop lug 80 of the unit so that the latter limits the carriage return movement, substantially as in Figure 9.

Detent device IOI-I03 sustains tappet plate 99 in operated position against the reaction of thus moving the levers H3, 32 against the force of the spring tails 31, it being understood that said force may be comparatively light.

Therefore, it is unnecessary to hold key I08 manually in operated position until the returning carriage is arrrested by the intermediate stop unit S, A spring I I1 attached to a stud II8 of key lever plate I08, may be provided to return the latter alone to normal position as soon as the typists finger is withdrawn immediately following operation of key I08. A simple tapping or momentary stroke on key I08 serves to move tappet plate 99 to operated position to determine that the, corresponding intermediate stop unit S will limit return of the carriage.

Key lever spring I Il may be anchored to a clip II9 fixed to the body 89 at I20. An elbow extension I2I of said clip cooperates with the side of the body 88 to retain the key plate I06 and the tappet plate 99 laterally on the body. Key lever plate I08, urged by spring III, may stop against cross-rod 21 as in Figure 2 to determine its normal position.

When tappet plate 89 of an intermediate stop unit S is moved to operated position by operation of key I08, a nose I22 on said plate 99 bears on and depresses the universal cross bar 38, and its thrust rod 44., to release carriage return trip link 48. Thi initiates a power return of the carriage which is terminated as the carriage counterposition. Figure 3.

stop30 meetsthestoplug u oisaid unitSJtbeing remembered that counterstop 38 willbe decause them arm III on thereturning carriage willbeengagedanddisplaced-bytheelevated tappet arm III of theplate 88 detented in set 7 Upon engagement oi! thedepressed counterstop 38 with said stop. lug 88, the continuing carriage return movement will move entire unit 8, and hence the cross rod 28, rlghtwardly. This rightward displacement or cross rod 28, which may be limited by cross rod shoulder 24, operates through thedescribed train, from link 18 to the carriage return'pinion shifter 81, to

unclutch the carriage return pinion II from the pinion shaft 83 and to restore trip link 48 to terminate the power return 01 the carriage as hereinbefore described with reference to the extreme carriage return stop 28. I

This rightward displacement of cross rod 28 operates through a cam I23, Figures 6, 8,9, 10,

provided on cross rod bracket ll, and a camencased pin I24, on the depressed cross bar 38, to elevate the latter to restored position, Figure 2. At such restoration, cross bar 38 works against the nose I22 01 tappet arm plate 88 to turn the latter counterclockwise from the operated position, Figure 3, to the normal position, Figure 2. A by-pass and slip-oil pawl I28 on thrust rod 44, Figure 1, permits substantially simultaneous but non-interfering restorations of trip link 48 and cross bar 38 at the rightward displacement oi cross rod 28 by the returning carriage. Details concerning said pawl I28 will be obvious from Figure 1, and for further description, reference may be had to the aforesaid Patent No. 2,160,251.

Figure 8, represents the relative positions of the parts just when cam arm II2 on the retuming' carriage meets the tappet arm III which stands elevated as a result of the corresponding key. I08 having been operated. The continuing return movement of'the carriage from the Figure 8 position then causes the cam armI I2, and its lever I I3, to be displaced by the elevated tappet arm III to depress counterstop 30 into line with stop lug 90. The depression of the counterstop may be completed before saidcounterstop, moving with the continuing carriage return, meets said stop lever 90. Then the depressed counterstop 30, still under way with the continuing carriage return, moves the entire stop unit S and cross rod 28 rightwardly'to unclutch the carriage return pinion 5| from the motor drive and to restore cross bar 38 and tappet arm plate 98 as hereinbefore described. The

, unclutching of pinion 5| may be completed before the cross rod shoulder I4 meets'standard 28 so that when the shoulder does reach said standard, it does so by decelerating momentum of the carriage, in order to avoid fundue shock.

Figure 9 represents the relative positionsoi the parts when the cross rod shoulder I4 meets standard 29. At this stage, although cross bar 38 has been restored upwardly and has restored tappet arm III downwardly, the vcounterstop 30 may still be, forthe moment, in a depressed position by reason of its contact ,with stop lug 90. Howeve the immediately following hereinbefore described drop-back movement of the carriage may be slightly in excess of the attendant leftward, return movement of cross rod 28 and stop lug 90, and this frees the counterstop 38 so that -unit in-whlch a anger key mlll ls op'erable manually to'move i remains in operated a plate ll having a'tappet Bether with plate II,

are similar to those described for plate 09,

The extreme margin stop I. may havea Isa-similar to II. and there may be associated therewith, as in Figure 5, a plate I21 similar to 2 plate as or it except that the tappet arm Iii of the latter is omited. Plate I21 may be operated, about its stud, by means of a key I28 merely to depress cross bar It to initiate a power carriage return to said extreme margin stop 26. Plate I21 need not be detented in operated position. The power return of the carriage to the extreme margin stop "may be initiated by operating the carriage return key lever on the main frame.

' As set forth in aforesaid the cam 42, associated with line-end margin stop 25, may be displaced at will to silence automatic initiation of a power carriage return by'the car- Patent No, 2,160,251,

- riage at a line-end, as when it is desired toselectively determine difierent returns of the carriage by means of the selectively operable keys Ill.

None of the keys I08, or M8", need be held down manually during power return of the carriage. Further, any key-operated tappet-arm, like ill,

will be automatically restored after cooperating to determine the limit of the corresponding carriage return and the restoration will be effected automatically irrespective of the station at which the stop unit S is placed. Hence, any stop unit S is freely adjustable to and will serve at any station in its range.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

What is claimed is:

1. In a typing machine; the combination of a laterally movable carriage, a stop-unit adjustable to different carriage-movement-limiting stations, a counterstop, said unit and counterstop being relatively movable and normally relatively positioned so as to be ineffective to operate, a key on said unit, means, including a device on said unit settable by operation of said key, to enable the carriage to move and relatively position said unit and counterstop so that they may cooperate to limit the carriage movement at the station for which the unit is adjusted, and means operable automatically under control of the carriage to restore said settable device consonantly with said unit and counterstop having cooperated to limit the carriage movement.

2. In a typing machine; the combination of a laterally movable carriage having a transversely movable stop, a stop-unit adjustable to different carriage-movement-limiting stations but normally ineffective at any station to engage the carriage stop to limit the carriage movement, a-

key on said unit, a device on said unit settable by operation of said key to determine movement of the carriage stop so that said unit may engage the carriage stop tolimit the carriage movement at the station for which the unit is set, and

means operable automatically under control oi riage movement,

the carriage to restore with said 'unit having said devioe-consonantly served. to limit the car- 8.'In'a. typing machine; the combination of a laterally movable. carriage having a transversely movable stop, a stop-unit adjustable to different carriage-movement-limiting stations but normally ineflective at any station to engage the carrlage stop to limit the carriage move. ment, a key on said unit, a device on said unit settable by operation' of said key to determine movement or the carriage stop so that said unit may engage the carriage stop to limit the carriage movement at the stationfor which the unit is set, means automatically detenting said device in set position 'irrespectively of sustained manual operation of said key, and means operable automatically under control of the carriage to eflect restoration of said with said unit having served device consonantly to limit the carriage movement.

- limiting the carriage movement, and means operable by such displacement of the unit to restore saiddevice. v

5. The combination with a laterally movable typing machine carriage. of a stop-unit adjustable to different carriage-movement-limiting stations but normally ineilective at any station to limit the carriage movement; said unit including a key and a device settable by manual operation of said key to determine that the unit may limit the carriage movement, said unit being limitedly displaceable by the carriage as the unit limits the carriage movement, an element connected to said unit'for displacement therewith, and means operable by such displacement of said element to restore said device.

6. The combination with a typing machine carriage, of a manually operable key adjustable to difierent stations in the range of carriage travel, a device settable by operation of said key at any station, normally ineifective stop-means for the carriage, a part on the carriage engageablewith the set device to make the stop-means effective so that subsequent movement or the carriage will be limited at said station, and means controlled by the carriage to restore said device consonantly with said stop-means having served to limit the carriage movement.

7. The combination with a support and a typing carriage thereon, of two stops, on the support and carriage, respectively, normally out of cooperative alignment but relatively movable into alignment for limiting the carriage movement, means supporting one of said stops for adjustment to difierent carriage movement, a key adjustable along with said adjustable stop, a device settable by operation or the key at any station, means engageable with the set device to align said stops, and means operable, in response to the engagement of said stops in limiting'the carriage movement. to restore said device.

8. The combination with a laterally movable unit instations in the range of carriage, of a stop-unit laterally. adjustableto diiferent carriage-movement-limiting stations,

- a movable counterstop associated with the carceding arrival of the carriage at the station of the unit, and means operable under control of the carriage to restore finally said element.

9. The combination with a laterally movable carriage, of a stop-unit adjustable to different carriage-movement-limiting stations, an element movably mounted on said unit so as to be settable to an operated position to determine eflectivity 01' said unit for limiting carriage movement,

' means on .said unit to retain said element in said position, said unit being limitedly displaceable consonantly with the unit-limiting the car- .riage movement, and means operable by such displacement 01 said unit to eil'ect restoration of carriage by said power means, said member being I also operable to restore said element, said unit being displaceable from a normal position by the carriage in cooperating to limit the carriage movement, and means operatively connecting said member and unit so that the displacement oi the latter operates said member'to restore said ele-' ment.

14. The combination with an advanceable carriage, and power mechanism for returning said carriage, or a stop-unit adjustable to different carriage-return-limiting stations, a. key 01) said unit, an element on said unit settable to a position by operation of said key to determine citesengage and restore said element at any station with the caration 01' said key to determine effectivity 01' said unit, said unit and support being displaceable from a normal position by the carriage in cooperating to limit the carriage movement, a member paralleling the adjustment range of said unit and operable to engage and restore said element at any station of the unit, and means operatively connecting said member and support for operating said member by the displacement of said support.

12. The combination with a carriage, and power means for moving said carriage laterally, of a stop-unit adjustable to different carriage-movement-limiting stations, a key on said unit, an element on said unit settable to a position by operation of said key to determine effectivity of said unit, a memberparalleling the adjustment range 01' said unit and connected so as to be optivity of said unit, means operable concomitantly with the key setting of said element to initiate return of the carriage by said power mechanism,-

- and means cooperable with said carriage and unit to shut oi! said power mechanism and restore said element.

15. The combination with an advanceable carriage, and power mechanism for returning .said caniage, of a support, a stop-unit adjustable along said support to different carriage-return-limiting stations, a key on said unit, an element on said unit settable to a position by operation of said key to determine eii'ectivity of said unit, a member paralleling the adjustment range 01' said unit and operable one way by the setting of said element to initiate return of said carriage by said power mechanism, said support and unit being laterally displaceable in cooperating to limit the carriage return, said member being operable also another way to restore said element, means operable by the displacement of said support to shut oi! the power mechanism, and an operative connection between said support and member whereby the displacement or the support-operates said member to restore said element.

16. The combination with an advanceable carriage, and power mechanism for returning said carriage, 0! stop means, including a key.. mounted for adjustment to'diilerent carriage-returnlimiting stations, and conditionable by operation oi the key for cooperating to limit the carriage erable concomitantly with the setting or said return, a member paralleling the adjustment range of said stop means and operable jointly with the conditioning of said step means to initiate a return of the carriage by said power mechanism, and means cooperative with said carriage and stop means to shut off the power mechanism,

said member being also cooperable with said carriage and stop means to restore said stop means to ineffective condition.

17. In combination, a frame, a. carriage laterally movable thereon, a stop-unit laterally adjustable on the frame te'diil'erent carriage-movement-limiting stations, a counter-stop on the carriage normally out of alignment with the stopunit, a lever on the carriage operable to move the counterstop into alignment with the stop-unit, an element on the stop-unit, a key on the stopunit operable to set said element to a position in the path of said lever to operate said lever by the movement or the carriage, said stop-unit being supported so as to be displaced as it cooperation of said key ,to determine effectivity of said unit, a member paralleling the adjustment range or said unit and connected so as to be operable concomitantly with the setting of said ele ment by said key to initiate movement of the erates with said counterstop to limit the carriage movement, and means operated by the displacement of said stop-unit to restore said element.

18. The combination with a laterally traveling carriage, of a stop on the-carriage movable transversely of the direction of can'iage travel, a stopunit complementary to the carriage stop, means mounting said stop-unit for adjustment to ditferent stations in the range oi. carriage travel, the carriage stop being normally out of line with the stop-unit, an element on the stop-unit settable from an idle position to an operated position, means cooperative with the set element to determine movement of the carriage stop into line with the stop-unit preparatoy to limiting the carriage movement at the station of the stopunit, means displaced at cooperation of the carriage stop and stop-unit in limiting the carriage movement, and means responsive to the displacement of said last-named means to restore the set element to idle position.

WILLIAM F. HELMOND.

4 Patent No. 2,335,566.

CER'HFICATE 0F CORRECTION.

' November 2, 1915.- WILLIAM F. HELnoNn.

It is hereby certified-that error appears in the printed specification of the above numbered patent requiring correction as follows: Page I4, firat column line 51+, claiin 1, for "oper'ate" read --'cooperate--; page 6, first column, line 7-, claim 18, for "'preparatoy" read --prepe.re.tory-; 'and thatthe said Letters Pa'tent houltl be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 15th a of August, A. 1). 191m.-

Leslie Frazer (3 51) Acting Commissioner of Patents. 

